feat: #1 impl an http body parser

src/handlers/request.rs

@@ -1,11 +1,14 @@
 //! request handles properly the incoming request
 //! it will parse the request according to the HTTP message specifications
 //! see: https://developer.mozilla.org/en-US/docs/Web/HTTP/Messages
+//! NOTE: only few parts of the specification has been implemented
+
+use json;
 
 #[derive(Debug)]
 pub enum HTTPVersion {
     Http1,
-    //http2,
+    //Http2,
 }
 
 impl Into<String> for HTTPVersion {
@@ -72,6 +75,31 @@ impl Into<String> for HTTPStartLine {
     }
 }
 
+/// HTTPBody represents http request body
+/// for simplicity, only json body are accepted
+pub struct HTTPBody {
+    data: json::JsonValue,
+}
+
+impl HTTPBody {
+    fn new(data: json::JsonValue) -> HTTPBody {
+        HTTPBody { data }
+    }
+}
+
+impl TryFrom<&str> for HTTPBody {
+    type Error = String;
+    fn try_from(body: &str) -> Result<HTTPBody, Self::Error> {
+        match json::parse(body) {
+            Ok(v) => Ok(HTTPBody::new(v)),
+            Err(e) => Err(format!(
+                "error occurred during request body parsing err={}",
+                e
+            )),
+        }
+    }
+}
+
 /// Request defined the HTTP request
 #[derive(Debug)]
 pub struct HTTPRequest {
@@ -156,3 +184,22 @@ fn test_handle_request() {
         assert_eq!(http_request.is_valid(), is_valid);
     }
 }
+
+#[test]
+fn test_http_body() {
+    let test_cases: [(&str, bool); 3] = [
+        ("hello, how are you ?", false),
+        ("qsdfqsdffqsdffsq", false),
+        (
+            r#"{"access_token":"AAAAAAAAAAAA.BBBBBBBBBB.CCCCCCCCCC","refresh_token": "DDDDDDDDDDD.EEEEEEEEEEE.FFFFF"}"#,
+            true,
+        ),
+    ];
+
+    for (body, is_valid) in test_cases {
+        match HTTPBody::try_from(body) {
+            Ok(_) => assert!(is_valid),
+            Err(_) => assert!(!is_valid),
+        }
+    }
+}